There are two concentric very thin shells with radii rA=5m and rB=10m. These shells have surface charge densities σA=28μC/m2 and σB=−25μC/m2. There are three points P1 , P2 and P3 in the figure and their distances from the center O are r1=4m , r2=7.0m and r3=21m respectively. a) Calculate the magnitude of net electric field at point P1. Magnitude of net electric field at point P1 b) Calculate the charge enclosed by the gaussian surface of radius, r2 . charge enclosed Give your answer to at least three significance digits. c) Calculate the net electric field at point P3. y component of net electric field

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.